TAFD10 by Hoya

Obsolete Unknown Environmentally Dangerous

TAFD10 by Hoya is an obsolete optical glass. It transmits from 0.32 to 1.55 µm with an nd of 1.815502 and a Vd of 44.5379. It has low thermal expansion (CTE of 6.3×10⁻⁶/K), good chemical resistance, very high relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.25–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.25–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–1.550 µm
Optical Properties
Refractive Index (nd) 1.815502
Abbe Number (Vd) 44.5379
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{3.2116 - 0.0145812\,\lambda^2 + 0.0291896\,\lambda^{-2} + 0.000510501\,\lambda^{-4} + 2.70253 \times 10^{-5}\,\lambda^{-6} - 1.84785 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 73.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.56561 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.56
Relative Cost 29.6
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-LaSFn10 Sumita 1.8155 44.4
LASFN10 Sumita 1.8155 44.4
S-LAH54 Ohara 1.815543 44.361146
LAH54 Ohara 1.815543 44.361146
K-VC100 Sumita 1.804 43.6
H-ZLAF1 CDGM 1.80166 44.263459
D-ZLAF50 CDGM 1.80337 45.491557
H-ZLAF69 CDGM 1.816 46.5493
D-ZLAF50-25 CDGM 1.80225 45.452746
H-ZLAF69A CDGM 1.816 46.556066
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
NBFD14 Hoya 1.801699 44.321602
M-TAFD51 Hoya 1.8208 42.71
MP-TAFD51-50 Hoya 1.8213 42.72
MC-TAFD51-50 Hoya 1.8213 42.72
TAF5 Hoya 1.816 46.57
MP-TAF31-15 Hoya 1.80154 45.47
MC-TAF31-15 Hoya 1.80154 45.47
M-TAF31 Hoya 1.80139 45.45
TAF3D Hoya 1.8042 46.5
TAF3 Hoya 1.8042 46.5
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